Book summary “Broad Band”: summary

Introduction

You likely know the technology industry as a male-dominated domain. This common view hides a rich lineage of female pioneers who built the internet, wrote the first computer programs, and forged digital culture. You might wonder how history forgot these foundational contributors.

You will discover the hidden history of female pioneers who built the internet, wrote the first computer programs, and forged digital culture long before the industry became male-dominated.

Claire L. Evans traces this vital heritage from early textile weavers and wartime mathematicians to modern cyberfeminists. You will examine the human computers, the programmers of the ENIAC, the architects of early networks, and the creators of decentralized community databases.

You will find answers to several crucial questions as you read:

• Who actually wrote the software for the earliest electronic computers?
• How did textile arts influence the logic of modern computing?
• What role did countercultural explorers play in building early networks?
• How did women shape digital culture and online communities before the web?

1. Human Computers and Early Weaving

For nearly two centuries, a computer was not a machine. It was a human job title describing someone who performed mathematical computations for a living. You find that the U.S. Naval Observatory placed the first classified ad for a computer in 1892.

Female mental labor and textile technology provided the foundational logic for modern computing.

The United States Naval Observatory placed a classified ad in the New York Times on May 1, 1892, reading COMPUTER WANTED to hire someone for mathematical astronomy calculations. These human computing offices acted as thinking factories that broke down large-scale math problems. They functioned as the grunt labor of organized science for tasks ranging from maritime navigation to the Manhattan Project.

The First Computers

Late nineteenth- and early twentieth-century scientific institutions hired teams of women computers at lower wages to analyze massive volumes of astronomical data. Astronomer Edward Charles Pickering hired women to analyze stellar data at Harvard because they could be hired for half the going rate of men.

Williamina Fleming, originally employed as a maid, discovered the Horsehead Nebula while working among Pickering's Harem at Harvard. These women cataloged thousands of stars, discovered nebulae, and developed stellar classification systems. The scale of human computing and early office work led mathematicians to measure machine labor using units based on female labor.

Mathematical panels and agencies measured computing energy in girl-years and kilogirls, representing thousands of hours of human computing labor. Simultaneously, the telecommunications industry became a massive employer of women operating switchboards and managing communication networks.

Jacquard and Ada Lovelace

The technological bridge between textiles and computing was forged by Joseph-Marie Jacquard's loom, which used punched paper cards to separate pattern from process. Jacquard's loom produced complex woven fabrics by reading sequences of punched cards. This concept inspired Charles Babbage to use punch cards to store programs and variables in his mechanical computing engines.

Charles Babbage owned a portrait of Joseph-Marie Jacquard woven from thousands of silk threads using twenty-four thousand punched cards, which guests frequently mistook for an engraving. Babbage adapted textile factory language for his machines, referring to a store for numbers and a mill for processing them.

Ada Lovelace recognized that general-purpose computing engines could manipulate any symbol, writing the first conceptual computer programs for a machine that was never built. Translating a paper by L. F. Menabrea on Babbage's Analytical Engine, Lovelace added extensive notes three times longer than the original text. She realized the engine could weave algebraic patterns just as a Jacquard loom weaves flowers and leaves, establishing the foundational concepts of software and input, storage, processing, and output.

2. The ENIAC Six and Grace Hopper

Early programming was grueling physical labor mastered by female mathematicians during wartime.

When Japan attacked Pearl Harbor, Grace Hopper was thirty-six years old and sixteen pounds underweight for military service. She drove a Model A Ford she called Dr. Johnson between Poughkeepsie and New York City, studying differential equations under Richard Courant. Hopper leveraged her background in applied mathematics and unconventional teaching methods to transition from academia into military service. She taught mathematics at Vassar, updating traditional subjects like calculus and topography with modern applications like rockets and imaginary worlds. Frustrated by civilian isolation, she aggressively lobbied to join the U.S. Navy and graduated first in her class at Midshipmen's School.

Grace Hopper and the Mark I

Assigned to Harvard instead of cryptography, Grace Hopper became a core programmer for the massive electromechanical Mark I computer. The Automatic Sequence Controlled Calculator was built by IBM and operated as a series of daisy-chained calculators driven by a four-horsepower motor. The machine weighed ten thousand pounds, stood eight feet tall, and contained 530 miles of wiring to process three calculations a second. Under the strict military discipline of Lieutenant Commander Howard Aiken, Hopper mastered the machine without a manual and wrote the code for complex wartime calculations.

When Hopper first arrived at Harvard, an irritated Howard Aiken demanded to know where she had been, testing her ability to write a program for interpolation coefficients within a week. In September 1945, Hopper found a moth beaten senseless by one of the relays inside the Mark I and scotch-taped it into the daily log, noting it as the first actual case of a bug being found. Hopper taped the moth into her logbook and later played pranks by scattering plastic bedbugs around the back of the computer. To save processing time during wartime calculations, Hopper and her colleagues pioneered reusable code blocks known as subroutines and established code documentation standards. Recognizing the inefficiency of rewriting code from scratch for every problem, coders shared handwritten scraps of reusable code and annotated master code sheets with comments and context.

The ENIAC Programmers

The ENIAC Six were a group of female mathematicians who transitioned from manual human computing to become the primary programmers of the electronic ENIAC. Pulled from the Moore School's computation section where they manually calculated firing tables using analog calculators, these women were tasked with preparing mathematical problems for the vacuum-tube computer without prior programming manuals. The machine featured a processing speed of five thousand calculations a second and used eighteen thousand vacuum tubes as switches.

Kay McNulty, Betty Jean Jennings, Elizabeth Snyder, Marlyn Wescoff, Frances Bilas, and Ruth Lichterman met on a railroad platform on their way to the Aberdeen Proving Ground. Programming the ENIAC required physical dexterity and hardware mastery because the machine lacked a high-level programming language. Because the ENIAC had to be physically reconfigured for every task, the programmers had to crawl inside the massive U-shaped structure to replace burned-out vacuum tubes, string hundreds of cables, and flip three thousand switches across forty panels grouped into thirty different units. Betty Snyder and Betty Jean Jennings worked around the clock before the 1946 public unveiling to fix a logic bug that prevented their artillery trajectory program from stopping upon impact, resulting in a trajectory calculation taking twenty seconds during the demonstration.

The contributions of female programmers were systematically erased in contemporary press coverage and historical accounts that glorified the hardware over human labor. Newspapers and military press releases characterized the ENIAC as a giant brain that solved problems autonomously, ignoring the weeks of programming and debugging performed by women. Furthermore, the ENIAC Six were excluded from the celebratory post-unveiling dinner. When the War Department used a publicity shot of the ENIAC for a recruitment ad, they cropped out the three women pictured, while male supervisors later claimed credit for writing the demonstration programs.

3. Commercial Software and Compilers

Presper Eckert and John Mauchly left the University of Pennsylvania due to patent disputes over the ENIAC. They established the Eckert-Mauchly Computer Corporation in an old hosiery mill in Philadelphia. You can trace their early commercial ambitions to a building situated between a junkyard and a cemetery.

Eckert and Mauchly founded the world's first commercial computer company, bringing together female programming pioneers to build machines for business and government.

They recognized the massive commercial potential of computers for census, payroll, and aviation calculations. They hired top former Moore School programmers like Betty Snyder, Betty Jean Jennings, Kathleen McNulty, and Grace Hopper to write custom software for their marquee product, the UNIVAC. EMCC secured early contracts with the Census Bureau, National Bureau of Standards, Northrop Aviation, and the Army Map Service. In 1947, the year Eckert and Mauchly founded their company, an annual salary discrepancy favored a recent male hire over Betty Jean Jennings before John Mauchly adjusted it by 400 dollars.

Due to capital loss following the death of an investor and IBM's rejection of their overtures, Eckert and Mauchly sold EMCC to Remington Rand, a manufacturer of guns and typewriters. Remington Rand's traditional sales force struggled to understand opaque magnetic tape and frequently sidelined female technical experts during sales calls. This culture clash dismantled the open, transparent environment of the startup. In 1952, the year of the CBS election broadcast featuring the UNIVAC, a UNIVAC running a statistical program live on CBS correctly predicted Dwight Eisenhower's landslide victory over Adalie Stevenson before traditional polls saw it coming. Remington Rand sold 42 UNIVAC machines in two years before management forcibly scaled down production to six per year.

Betty Holberton revolutionized early programming by working closely with John Mauchly to develop C-10, the elemental operational code for the UNIVAC that incorporated letters as shorthand for common operations. This made programming more accessible to non-mathematicians. She also introduced two-dimensional flowcharts to handle looping instructions and invented the Sort-Merge Generator, which automatically generated routines for sorting and merging data files using tape units.

Betty Holberton revolutionized early programming by creating user-friendly instruction sets, elegant flowcharts, and the first program that wrote another program.

Betty Holberton's Sort-Merge Generator marked the first time a computer was used to write a program that wrote another program, baffling establishment critics who claimed computers were strictly limited to basic arithmetic.

UNIVAC and Software Innovation

Grace Hopper spearheaded automatic programming by developing compilers that allowed computers to translate high-level pseudo-code into machine instructions. To escape the labor of manual coding and address the severe shortage of skilled programmers, Grace Hopper advocated for automatic programming where software could be written in machine-independent languages. She finished the first compiler, A-0, in the winter of 1951, which assembled subroutines into machine code. Successive iterations like the A-2 introduced pseudo-code in the spring of 1953, effectively turning mathematicians into linguists and making programming accessible to nonexperts.

Grace Hopper presented her paper 'The Education of a Computer' at an Association for Computing Machinery meeting in Pittsburgh in May 1952, explaining how adding an intermediary compiler layer ultimately increased programming efficiency. The early A-0 compiler achieved an 18 to 1 speed increase over conventional programming techniques. Remington Rand faced a 945,000 dollar estimated cost to implement a new compiler, with 45.5 man-years required to implement a compiler transition.

Compilers and the Software Crisis

The development of COBOL through a Department of Defense committee established a universal, hardware-independent business programming language. Fearing a Tower of Babel situation with proliferating incompatible programming languages, Grace Hopper and Mary Hawes initiated efforts for a common business language. Sponsored by the Department of Defense via the Conference on Data Systems and Language, a short-range committee known as the PDQ Committee developed the specifications for COBOL in late 1959, creating a collaborative technological armistice that dominated global software for decades. In the late 1950s, the Department of Defense ran 225 computer installations. By the turn of the millennium, 80 percent of all code on the planet was written in COBOL, representing roughly seventy billion lines of code and necessitating emergency fixes for the Y2K bug.

Amid public project failures and a massive shortage of skilled programmers dubbed the software crisis, international conferences sought to rebrand programming as software engineering. This professionalization introduced formal educational prerequisites and credentialing that penalized self-taught programmers and women. Systemic wage discrimination and a lack of childcare pushed female workers into lower-status data entry jobs like keypunch operation. In the late 1960s, the average annual salary for female programmers was 7,763 dollars, while the median annual salary for male programmers doing the same job during the same period reached 11,193 dollars. At a 1968 international conference held in Garmisch, Germany, to address the software crisis, attendees officially rebranded programming as software engineering, and no women were invited to attend.

4. Caving, Networks, and Counterculture

Countercultural technologists and cave explorers translated physical spaces into early interactive games and decentralized community databases.

Will and Patricia Crowther combined a passion for caving with advanced programming skills. They utilized terminals connected to mainframes at Bolt, Beranek and Newman to plot cave surveys. This created early computerizations of cave cartography that treated software as the ultimate victory of description over thing.

Patricia Crowther navigated a tight vertical crevice known as the Tight Spot to make the historic final connection between Flint Ridge and Mammoth Cave. This united them into a single 340-mile cave system within the 400 miles of limestone passages.

Colossal Cave Adventure

Following his divorce from Patricia, Will Crowther translated his memories of mapping Mammoth Cave into 700 lines of FORTRAN code. The game relied on second-person descriptions and imperative commands, reflecting the mental models of caving while spreading rapidly across the ARPANET.

Will Crowther hid the family password and cheat code XYZZY in the game to let his sister Betty Bloom quickly transport elsewhere. This created an early precedent for video game cheat codes.

Resource One and Community Memory

Project One served as a technological commune in San Francisco where counterculture activists integrated heavy mainframe computing into grassroots community initiatives. Housed in a massive 84,000-square-foot warehouse, Project One residents established a community computer center called Resource One.

Pam Hardt-English negotiated with TransAmerica Leasing Corporation to acquire a surplus Scientific Data Systems 940 mainframe computer as a tax-deductible donation. She brought the 150,000-dollar machine to the Project One warehouse on a semitruck, joining a pool of only 57 such computers on Earth at the time.

Community Memory pioneered electronic public bulletin board systems, proving that networked computing could foster local bonds and serve as a decentralized information utility. Operated by Resource One members and seeded with provocations by Jude Milhon, Community Memory connected a remote terminal via modem to a mainframe database.

Jude Milhon posted a question asking where to find a good bagel in the Bay Area, which immediately sparked a chain of crowdsourced responses and practical replies from local users.

The women of Resource One developed the Social Services Referral Directory to apply computing power to practical community needs, prioritizing human utility over pure technological novelty. After male countercultural operators rejected terminal-based networking, female members like Mya Shone, Sherry Reson, Mary Janowitz, and Joan Lefkowitz maintained a centralized database on the mainframe. They distributed printed loose-leaf binders to social workers across San Francisco, resulting in the Bay Area-wide Social Services Referral Directory with two binders, each three inches thick.

The team made dozens of phone calls daily to verify local resources and manually collated pages on the floor before mailing manila envelopes containing updated directories to participating social agencies.

The professionalization of software engineering coincided with a sharp decline in the representation of women pursuing computer science degrees, obscuring the foundational contributions of women in early computing. In 1984, the number of women pursuing computer science degrees in the United States began a steady dive.

Honeywell marketed a 10,000-dollar home computer complete with an apron and cutting board in the 1969 Neiman Marcus Christmas catalog. This Kitchen Computer reinforced sexist tropes that framed technology as a tool reflecting male authority over female domestic users.

5. Infrastructure, Bulletin Boards, and Cyberfeminism

Women built the internet's directory infrastructure, founded independent electronic salons, and launched cyberfeminist movements to reclaim digital spaces.

The Network Information Center

Elizabeth Feinler directed the Network Information Center at Stanford. Her team cataloged every host site, managed registries, and operated a high-volume reference desk.

Elizabeth Feinler built the NIC from a two-person operation into an eleven-million-dollar project while producing the first thousand-page Resource Handbook. In 1972, Jake joined Douglas Engelbart's team at Stanford. In 1974, the NIC took over maintaining the central registry Host Table.

The NIC created the WHOIS server as an online people finder and user profile database. Executing a query like WHOIS Jake Feinler returned names, addresses, e-mail addresses, and net affiliations. Over forty years, WHOIS has evolved and persisted.

Jake Feinler and her colleagues devised category extensions based on institution types to standardize addressing formats. The team debated between .bus and .com for commercial entities, ultimately settling on .com along with extensions like .mil, .edu, .gov, and .org.

Echo and Cyberfeminism

Stacy Horn founded Echo in New York to serve as an East Coast intellectual and cultural salon. Stacy Horn funded Echo using her savings and severance pay, personally recruiting early members by visiting art openings, bars, and parties to convince strangers to buy modems and join.

By 1994, Echo operated thirty-five phone lines. At Echo's peak, it reached forty-six thousand users.

Stacy Horn successfully cultivated a high percentage of female users on Echo by employing deliberate outreach strategies. Across the entire Internet, the female population was only ten to fifteen percent at the time Echo was founded.

Women's WIRE launched in October 1993 to a founding group of five hundred members. Subscribers paid fifteen dollars a month plus an hourly connection fee. Male users accounted for ten percent of Women's WIRE.

You can use platforms to:

• access information and resources instantly;
• discover new heroes;
• tell your stories;
• vent your frustrations;
• get advice.

The art collective VNS Matrix created a provocative billboard and manifesto in Australia. In 1991, VNS Matrix wheat-pasted their manifesto on city walls. In the summer of 1992, VNS Matrix posted an eighteen-foot billboard in Sydney, Australia.

Achieving true equality requires deliberate action. You must:

• see technological history clearly by recognizing who was truly present at pivotal points without relying on garage myths and alpha nerd tropes;
• learn all strategies of triumph and survival from historical forebears like Ada Lovelace, Grace Hopper, and the women of Resource One;
• get to work.

Conclusion

The history of computing reveals that technology is an active social construct rather than an inevitable march of engineering. You see that hardware and software reflect the people who build them, adapt them, and use them to shape society. Claire L. Evans demonstrates that women were central to every era of digital evolution, from manual weaving logic to early internet infrastructure and cyberfeminism.

You can apply these historical lessons to your own engagement with technology today through three practical rules.

1. Recognize the hidden labor and foundational contributions of diverse pioneers in any technological field you study or enter.
2. Adopt historical survival strategies by building supportive communities, independent networks, and collaborative spaces outside traditional gatekeepers.
3. Get to work by actively creating digital tools, writing code, and shaping online culture rather than accepting technology as something done to you.

10 Key Ideas

1. For nearly two centuries, a computer was not a machine but a human job title describing someone who performed mathematical computations for a living.
2. Ada Lovelace recognized that general-purpose computing engines could manipulate any symbol, writing the first conceptual computer programs for a machine that was never built.
3. The ENIAC Six were a group of female mathematicians who transitioned from manual human computing to become the primary programmers of the electronic ENIAC.
4. Grace Hopper spearheaded automatic programming by developing compilers that allowed computers to translate high-level pseudo-code into machine instructions.
5. The development of COBOL through a Department of Defense committee established a universal, hardware-independent business programming language.
6. Will Crowther translated his memories of mapping Mammoth Cave into 700 lines of FORTRAN code to create the Colossal Cave Adventure game.
7. Community Memory pioneered electronic public bulletin board systems, proving that networked computing could foster local bonds and serve as a decentralized information utility.
8. Elizabeth Feinler directed the Network Information Center at Stanford where her team cataloged every host site, managed registries, and operated a high-volume reference desk.
9. Stacy Horn founded Echo in New York to serve as an East Coast intellectual and cultural salon while successfully cultivating a high percentage of female users.
10. The art collective VNS Matrix created a provocative billboard and manifesto in Australia to launch cyberfeminist movements that reclaim digital spaces.